带压开采工作面构造导水性微震监测研究

Study on microseismic monitoring of structural water conductivity in working face under pressure mining

为研究带压开采工作面回采期间构造及隐伏构造是否会出现沟通深部含水层的现象,以赵固一矿为研究对象,采用矿井水害微震监测技术,对16091工作面回采阶段进行监测预警,捕捉到工作面过构造期间,近煤层破碎加剧但深部事件数量及所占比例未增大,反映底板裂隙未出现向下进一步发育趋势。同时对断层参数与事件最大发育深度进行相关性分析,研究断层导水性影响因素。结果显示,该工作面回采未引发构造导水性增强,断层落差比倾角对断层沟通深部流场的影响程度更大。

In order to study whether the structure and concealed structure would communicate with the deep aquifer during the mining of the working face with pressure mining,taking Zhaogu No.1 Mine as the research object,the microseism monitoring technology of mine water disaster was used to monitor and warn the mining stage of No.16091 Face.It was captured that during the period of the working face passing through the structure,the crushing near coal seam was intensified,but the number and proportion of deep events did not increase,reflecting that the fracture of the floor did not develop further downward.At the same time,the correlation between fault parameters and the maximum development depth of the event was analyzed to study the influencing factors of fault water conductivity.The results showed that the mining of the working face did not cause the enhancement of structural water conductivity.The fault drop had a greater influence on fault communicating deep flow field than the dip angle.